Abstract

In this study, we describe a new species of elongated marine flatworm, Eucestoplana ittanmomen sp. nov., collected from the intertidal zone of the Okinawa Islands, Japan. Eucestoplana ittanmomen sp. nov. is distinguished from other congeners based on the following characteristics: i) its translucent body lacking coloration, ii) its dome-shaped penis sheath, iii) the absence of cilia on the inner wall of the male atrium except outside the penis sheath, and iv) the presence of an adhesive organ at the posterior end of the body. Additionally, we report the occurrence of E. cf. cuneata (Sopott-Ehlers & Schmidt, 1975) in Japan; E. cuneata has previously been documented in the Galapagos and Fiji Islands. We conducted phylogenetic analyses to infer the positions of the two Eucestoplana species within Cestoplanidae using a concatenated dataset comprising partial 18S and 28S rDNA sequences from E. cf. cuneata and E. ittanmomen sp. nov. from Japan, as well as four known Cestoplana species with sequences available in public databases. Our phylogenetic analyses revealed that Cestoplana and Eucestoplana were reciprocally monophyletic. Furthermore, the genetic distance of the 16S rDNA sequences supported the genetic independence of the two sister species, E. cf. cuneata and E. ittanmomen sp. nov.

Addeddate

2024-05-08 18:10:33

Bhl_virtual_titleid

165999

Bhl_virtual_volume

v.99(2023)

Call number

10_3897_zse_99_102604

Call-number

10_3897_zse_99_102604

Foldoutcount

0

Genre

article

Identifier

newspeciesslend99tsuy

Identifier-ark

ark:/13960/s2vg49kgpjg

Identifier-bib

10_3897_zse_99_102604

Identifier-doi

10.3897/zse.99.102604

Ocr

tesseract 5.3.0-6-g76ae

Ocr_detected_lang

en

Ocr_detected_lang_conf

1.0000

Ocr_detected_script

Latin

Ocr_detected_script_conf

1.0000

Ocr_module_version

0.0.21

Ocr_parameters

-l eng

Page_number_confidence

72

Page_number_module_version

1.0.5

Page_range

363-373

Pages

11

Pdf_module_version

0.0.23

Possible copyright status

In copyright. Digitized with the permission of the rights holder.

Ppi

300

Source

Zoosystematics and Evolution 99

Year

2023

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